Filter-press



(No Model.) 2 sheets- Sheet 2.

B. BOOMER.

FILTER PRESS.

No. 301,794. llmemd July a, 1884;

NITED STATE-,s

' PATENT OFFICE.

' G'EORGEB. POOMER, OF MOUNT PLEASANT, YORK.

FILTEIRQPRESS.

' vSPII-IlCII-"ICATI'IOIKT `forming part of Letters Patent No. 301,794, dated July 8, 1884.

Application filed May 3, 1884. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE B. BooMnR, of Tarrytown Heights, in the townI of Mount Pleasant, county of Westchester, State of N ew York, have invented a new and usefull Improvement in Filter-Presses, lof which the following is a full, clear, and exact'description,

.reference being had to the accompanying drawings, makingapart of this specification.

4My invention relates to improvements in presses for .separating liquids from solids, and is designed to produce a press whichy can be instantly filled with material, quickly and easily discharged, and in which the material is closely confined while pressing. It also applies to presses usually denominated filterpresses, where the material is of so soft or liquid a nature that vthe'press can be lled with a pump. v

In the drawings illustrating my improvements, in which like letters indicate like parts, Figure l is a side view of a press containing my improvement, showing two boxes in section, and the upper and lower doors of one of the boxes opened. Fig. 2 is an enlarged sectional view of abox and its plunger, showing the plate, cloth, and frame, arranged on the inner face of the box, and on the plunger when ready for use. Fig. 3 is aview of the inner face ofthe box, showing vthe grooves on the same. Fig. 4c is a view of the grooved plate fitting over the face of the box.

` Fig. 5 is a view of the frame for holding the cloth in position. Fig. 6 is a view of the inthe arrangement of the same with wooden slats. Fig. 7 is a sectional sidey view of a press adapted to be filled bymeans of a pump, and containing my improvements.4 v My invention consists of a novel arrangement and construction of the telescoping boxes in a horizontal position, with doors on the upper and lower sides through which the' boxes are charged and discharged, and oi` the arrangement of the cloth on the face of the box and on the plunger, so that it will remain in place when lthe box is emptied, and yet can easily be removed to be cleanedor renewed, and in the arrangement,with the ordinary fllter-press ll'ed by means of a pump, of the telescoping boxes to more completely extract the liquid. The boxes B are preferably rectner face of the box in perspective, showing angular in shape, having the greatest length Vin a perpendicular direction; but the shape of the boxj may be varied, and the top and bottom maybe arched, if desired; but in all cases the vertical sides of the'box should be straight to allow the cake or the material, after having been pressed, to drop out through thebox it may be a little'wider at the bottom than at the top.- The upper and lower sides ofthe box, or the top and bottom,are formed by doors D D', shown open and closed in Fig.

being securely and tightly closed to resist the pressure when the press is in operation. These doors are generally hinged to one'of the vertical sides of the box, and are secured by any suitable fastening to the opposite side. On the back of each box is the plunger P adapted to slide into the succeeding box on the press. The face of the plunger and the inner nel or ridgeon the bottom4 of the face, from'v which a groove, g', conducts the liquid to the common outlet o. Against this grooved face F of the box is placed a thin metallic plate, C, Fig. 4. As will be seen from the drawings, this plate C has a'series of grooves, c, running gles to those on the face F. This plate C is persponding in position with the vertical grooves on the face F, and opening into the horizontal grooves c. The grooves c in the plate are made very narrow or fine, and the edges rounded sov as not to cut or injure the cloth.

Over the grooved side` of the plate G is placed the lter-cloth E, whichis held in position and against the plate by the frame H, Fig. 5, screwed or otherwise attached to the same. The frame H tightly secures the cloth forated vby a number of small holes, c', corre-- the bottom, and to facilitate the discharge of 6o 1, which open outward, and are capable of face of the box against which the material is horizontally acrossthe same, or at right an- IOO 50 shows a number of boxes in position.

at the edges, and, if necessary, in the middle, and prevents the cloth from being disturbed or withdrawn when the press is run back and the cake is dropped out of the box.

In the arrangement described above, the plate C, cloth E, and frame H are attached together, the grooved side of the plate being next to the cloth, and then by means of grooves in the sides of the box slid through the bottom door into their place in front of and against the inner face, F, of the box, as shown in Fig. 2.y By this method of construction the cloth may readily be removed from the box when it is necessary to cleanse or renew it; but the 15 plate C maybe fastened directly to the face of the box, and the several parts attached together in any convenient manner, so as to be easily removed. The outside bars of the frame H, as shown in the drawings, are beveled or `made thick on their outer edges, so that the pressure in pressing will tend to force them out against the sides of the box, proventi ng the material from being forced between the plunger and the sides of the box. For the same 2 5 reason the frame is made to accurately iit the box. This frame not only holds the cloth in place, but also presses the material toward the center away from the sides of the box,and makes the cake thinner on its edges, thereby squeezing the edges of the cake dry. and also greatly reducing the strain on the sides and doors of the boxes.

To the face of the plunger, as is shown in Fig. 2, are secured a metallic plate, .filter-cloth,

3 5 and frame, siniilarin all respects to those on the inner face of thebox, so that the construction of the pressing-surface of the plunger and of the box is the same.

Vhen the material is of a more pliant nature, like the pomace from apples, iish-refuse, and refuse from slaughter houses, the metal plate C and frame H may be dispensed with, and the face of the box and of the plunger constructed with narrow ribs of wood, as

shown in Fig. 6, to which the cloth is directly secured to the iixed end piece, Z. As will be seen from Fig. 2, the i'ace of the plunger is introduced just within the open edge of the box, so as to inclose the space within and to coniine the material or charge in the box.

from separating from the box by means of the bolts or rods R, Fig. 1, which pass through ears r on the sides of the box, and are provided on each end with nuts,which can be ad- 6 5 justed as desired. As these rods rest loosely in the ears, they readily slide back and 'forth in the same, and offer no obstruction to the The plunger is held in this position and prevented the interior only at the top and bottom by means of the doors. The boxes and plungers thus constructed and arranged in connection with each other are hung or supported on the rods S of the press, as shown in Fig. l, so that they will readily slide back and forth on the same. These rods in the press illustrated in the drawings are secured at one end to a movable head-piece, A,which rests upon rollers, as shown, and pass at the other end through a iixed. end piece, Z, beyond which they are connected with the pinions and wheels from which the power to work theprcss is derived.

rlhe arrangement of the rods and of the head and end pieces may be varied, and I do not wish to conine myself to the screw-press shown, as the hydraulic or any other kind of power may be employed, if desired.

rlhe boxes having been put together, as shown and described, the operation of the press is as follows: The press being extended, as is seen in Fig. l, so that each plunger is just within the open edge of its box, as shown in section in Fig. 2, the door in the top or upper side is opened and the box filled with the material to be pressed. rlhe door is then closed and securely fastened, and .the press run together. As the liquid is pressed from the material it is forced through the iltcr-cloths on the box and on the plunger, and collects in the horizontal grooves c on the plates C, from whence it passes by means ot' the holes of through the plates into the vertical grooves on the inner face of the box and on the plunger. In the former case the liquid flows down the grooves f into a channel, G, formed in the frame of the box below the face F, and escapes by means of the groove g through the outlet o into a trough placed below the press. The liquid in the grooves on the plunger flows into the channel or ridge on the face of the plun ger, before described, and passes out by means of a groove, g, through the common outlet o. After all the liquid is extracted the press is run back, the doors at the top and bottom of the box are opened, and the dry cake is dropped out through the bottom, and may be received in a car or other receptacle run under the press for the purpose. rlhe lower door is -then closed, the box refilled through the top, and the process of pressing repeated.

As will be seen from the above description the process of charging and discharging the boxes is a very easy and rapid one.

By a simple arrangement the doors of al1 the boxes may bevopened and closed at one operation, and the boxes may be filled simultaneously. As in pressing the same pressure is exerted in all the boxes alike it follows that the liquid is extracted in all in the same time,

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and when the press is run back the cakes in all the boxes are ready to be discharged.

When the press is to be used as a filterpress, with material of so soft or liquida nature that it can be pumped into the boxes, a hole or passage is made. through the back of the boxes and through the plungers, as shown in Fig. 7, so as to connect the interior of the boxes with one another. This hole o'r passage extends through the plates C and through the filter-cloths, and is provided with a thimble or other device, so as to prevent the liquid from passing back of the filter-cloths or anywhere but into the boxes. `In this' construction the frame H should be so made as to hold the cloth tightly around the hole or passage.

The first or stationary box being connected.

with the pump by means of a supplypipe, the operation is as follows: rllhe plungers being drawn out to their full extent, and the top and bottom doors of the boxes closed and secured, the semi-liquid material is pumped in until the boxes become iilled with the solid portion, the liquid portion having been forced through the filtering-cloths and passed off. When sufficient material has been forced into the boxes, a valve inthe supply-pipe is closed and the press put in operation. When the material is thoroughly pressed, it is discharged as before described. Thus with my system of telescoping boxes when applied to a iilterpress, after the power of the pump to extract the liquid has been exhausted, I am enabled to continue the process of pressing or filtering, and still further separate the liquid from the material in the boxes.

What I claim is- 1. In a press for separating liquids from Vsolids,` telescoping boxes arranged in a horizontal position, and provided with doors at the topand bottom, constructed substantially as described, and for the purposes set forth.

2. In combination with horizontally arranged telescoping boxes having doors at the top and bottom, the plates C, grooved on their faces and perforated with `holes in the grooves,

the yfilter-cloths S, and frames H, substantially l as described, and for the purposes set forth.

3. In combination with the telescoping boxes arranged in a horizontal position, the

plates C, cloths S, and frames H, connected together and arranged to slide in grooves or their equivalents in the box, substantially as set forth.

4. In combination with the horizontally-arn ranged telescoping boxes having doors at the top and bottom, the filter-cloths attached to the face of the bdx and to the plunger, sub- Witnesses:`

-FRANCIS L. GRoss, E. .IOHN M. BECKER.

GEO. B. BooMEn. n 

